Questions on UI for WPF Forum

1 answer

310 views

Delete RadTreeView Items with Delete Key

Telerik support,

I have a RadTreeView that is populated with DataBinding to an XML data file. I use a Hierarchical DataTemplate in the XAML code to populate the Tree. I would like to use the following in the C# code-behind to delete elements with the delete key. This works fine for all of the first-level nodes in the Tree. I would like to be able to select child items also and delete them in the same way. The child items are created with DragAndDrop.

Here is the code to delete the parent items:

void MyView_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key.Equals(Key.Delete))
            {
                IList source = this.MyView.ItemsSource as IList;
                source.Remove(MyView.SelectedItem);
            }
        }

How can I change this to delete the child items also? I have looked at some of the examples in the forum, and I found

foreach

(MyItem item in MyView.ItemsSource)

{

foreach (MyItem child in item.Children)

{

source.Remove(MyView.SelectedItem);

}

but I don't know what to use for item.Children in the 2nd foreach statement if this is the best way to find all child nodes.

Thanks,
Scott

TreeView

answered on 14 Jun 2011

1 answer

115 views

TabControl don't scroll after adding an item

Hello telerik-Team,

Starting-Situation:
Adding more as you can see(in the ScrollViewer) to the TabControl.
http://theupload.co.de/images/1_bitab.JPG

Problem:
If you add an item, the ScrollViewer don't scroll to the last item you have just added.
You have to scroll manual with the scroll arrow to the last item.
http://theupload.co.de/images/2_bitab.JPG
I hope you understand my problem.

Question:
How could i solve this problem.

TabControl

answered on 14 Jun 2011

2 answers

135 views

"Folded" rows

I have some data with many columns, which usually displays with a horizontal scroll bar. But when the user edits a row, I would like all of the columns to be on the screen at once for that row.

Is there a way to fold a row with many columns so that it continues on one or more lines? If so, could the continuation line(s) have column headings?

GridView

answered on 14 Jun 2011

4 answers

232 views

Filter To Expression

Hi,
I use event 'Filtered' to capture a user column filtering.

I want send this filter over the wire (WCF) to a server and call a query there.

the problem is to serialize DistinctValuesFilterDescriptor ...

Do you provide any solution how to use DistinctValuesFilterDescriptor and send it over the WCF ...

thanks in advance

Robert

GridView

answered on 14 Jun 2011

2 answers

409 views

RadDateTimePicker SelectedValue does not change when user clears input

I have a RadDateTimePicker control in a view that is bound to a datetime property in the associated viewmodel using the SelectedValue of the RadDateTimePicker. When the user selects a date and / or time, the datetime property in the viewmodel is set accordingly. However, if the user subsequently clears the input and the default 'Enter date' text is displayed in the control, the datetime property in the viewmodel is not set to null / mindatetime.

How can I implement the RadDateTimePicker so that if a user clears the datetime from the control the SelectedValue becomes null or mindatetime?

DateTimePicker

answered on 14 Jun 2011

3 answers

356 views

Image + Image name in GridViewImageColumn

The following was my code.

<telerik:RadGridView.Columns>
	<telerik:GridViewDataColumn Header="ID" UniqueName="colID" DataMemberBinding="{Binding Id}" IsVisible="False"  />
	<telerik:GridViewImageColumn Header="Photo"  UniqueName="colImage" DataMemberBinding="{Binding ProductImage}" ImageHeight="20" ImageWidth="20"/>
	<telerik:GridViewDataColumn  Header="Product Name" UniqueName="colDisplayName" DataMemberBinding="{Binding ProductName}"/>
</telerik:RadGridView.Columns>
I have some requirement
i.e Instead of showing "Product Image" and "Product Name" in two different columns i want show both in one column.
like photo +"space" + its name.
Regards
Naresh Mesineni

GridView

answered on 14 Jun 2011

0 answers

132 views

click event of GridViewToggleRowDetailsColumn

I have some problem.I am showing data in Nested Gridview .i.e when I select gridview row again I am showing nested grid with some details.
But I have some problem.when I click on + symbol data is not loading.when I click on row data is loading.
please help me in this matter.

Regards
Naresh Mesineni

GridView

asked on 14 Jun 2011

2 answers

135 views

WPF 4.0 theme issue

Got a little issue, installing the latest version, not to mention, the tool box is a bit of a mess, as the items repeats it self, also another issue i have notice, when i create a new project base on telerik i don't see the theme tab, is that normal?
i am ruining vs 2010 ultimate, any help would be great

cheers

Jason

Installer and Visual Studio Extensions

answered on 14 Jun 2011

1 answer

104 views

Pdf as a CarouselItem

Hi,

I would like to know if it's possible to display pdf document into a Carousel?

1. Having each pdf pages as a CarouselItem

or

2. Having a pdf document and all of it's content into a CarouselItem

Actually, it's possible in my situation to have multiple pdf documents, that's why I'm planning to use a Carousel

Thank's

Carousel

answered on 14 Jun 2011

7 answers

141 views

NullReferenceException on deferred load of series

This sample raises NullReferenceException in tha AxisX.CalculateItemRange method
View:

<Window.Resources>

<DataTemplate x:Key="measTemplate">

<telerik:RadChart ItemsSource="{Binding ChartData, Mode=OneWay}" >

<telerik:RadChart.DefaultView>

<telerik:ChartDefaultView>

<telerik:ChartDefaultView.ChartLegend>

<telerik:ChartLegend UseAutoGeneratedItems="True" Header=" " x:Name="chartLegend">

</telerik:ChartLegend>

</telerik:ChartDefaultView.ChartLegend>

<telerik:ChartDefaultView.ChartArea>

<telerik:ChartArea LegendName="chartLegend" EnableAnimations="True">

<telerik:ChartArea.AxisX>

<telerik:AxisX />

</telerik:ChartArea.AxisX>

<telerik:ChartArea.AxisY>

<telerik:AxisY DefaultLabelFormat="F2"/>

</telerik:ChartArea.AxisY>

<telerik:ChartArea.AdditionalYAxes>

<telerik:AxisY AxisName="Secondary" DefaultLabelFormat="F2"/>

</telerik:ChartArea.AdditionalYAxes>

</telerik:ChartArea>

</telerik:ChartDefaultView.ChartArea>

</telerik:ChartDefaultView>

</telerik:RadChart.DefaultView>

<telerik:RadChart.SeriesMappings>

<telerik:SeriesMapping LegendLabel="R">

<telerik:SeriesMapping.SeriesDefinition>

<telerik:LineSeriesDefinition ShowItemLabels="False" AxisName="Secondary"/>

</telerik:SeriesMapping.SeriesDefinition>

<telerik:ItemMapping FieldName="ValueY" DataPointMember="YValue"/>

<telerik:ItemMapping FieldName="ValueX" DataPointMember="XValue"/>

</telerik:SeriesMapping>

<telerik:SeriesMapping LegendLabel="C">

<telerik:SeriesMapping.SeriesDefinition>

<telerik:LineSeriesDefinition ShowItemLabels="False"/>

</telerik:SeriesMapping.SeriesDefinition>

<telerik:ItemMapping FieldName="ValueY1" DataPointMember="YValue"/>

<telerik:ItemMapping FieldName="ValueX" DataPointMember="XValue"/>

</telerik:SeriesMapping>

</telerik:RadChart.SeriesMappings>

</telerik:RadChart>

</DataTemplate>

</Window.Resources>

<DockPanel>

<ItemsControl ItemsSource="{Binding Context.Charts}" ItemTemplate="{StaticResource measTemplate}">

<ItemsControl.ItemsPanel>

<ItemsPanelTemplate>

<UniformGrid Columns="1" />

</ItemsPanelTemplate>

</ItemsControl.ItemsPanel>

</ItemsControl>

</DockPanel>

View CodeBehind
public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

this.Context = new Context();

this.DataContext = this;

}

public Context Context { get; set; }

}

public class Context

{

public Context()

{

this.Charts = new ObservableCollection<ChartDataHolder>();

for (int i = 0; i < 2; i++)

{

this.Charts.Add(new ChartDataHolder());

}

public ObservableCollection<ChartDataHolder> Charts { get; private set; }

}

ViewModel:

public class ChartDataHolder

{

private readonly BackgroundWorker worker = new BackgroundWorker();

public ChartDataHolder()

{

		this.ChartData = new ObservableCollection<ChartDataItem>();

worker.DoWork += this.worker_DoWork;

this.worker.RunWorkerAsync();

}

void worker_DoWork(object sender, DoWorkEventArgs e)

{

Thread.Sleep(TimeSpan.FromSeconds(1)); //!! Without it it works fine

while (true)

{

for (int i = 0; i < 2; i++)

{

Application.Current.Dispatcher.BeginInvoke(new Action(this.ProcessResult), null);

}

Thread.Sleep(TimeSpan.FromSeconds(5));

}

private void ProcessResult()

{

this.ChartData.Clear();

for (int i = 0; i < 20; i++)

{

this.ChartData.Add(new ChartDataItem() { ValueX = DateTime.Now.Second + i, ValueY = DateTime.Now.Second + i });

}

public ObservableCollection<ChartDataItem> ChartData { get; private set; }

}

Chart

answered on 14 Jun 2011

View: <Window.Resources>

View:
<Window.Resources>